Johnson Controls P170CA-1 Pressure Control

The Johnson Controls P170CA-1 Pressure Control is a professional-grade low pressure control designed for precise regulation in commercial refrigeration and HVAC systems. Engineering for durability, this SPST pressure switch features an Open-High action, making it an ideal choice for capacity control or high-pressure cutout applications. With an adjustable pressure range of 20" Hg to 100 psi and a field-settable 7-50 psi differential, this controller provides the flexibility needed for various system load requirements. It is a direct P70CA-56 replacement, ensuring a seamless fit for technicians updating older Penn or Johnson Controls installations.

Built with a rugged NEMA 1 enclosure and an all-steel case, the P170CA-1 is compatible with all non-corrosive refrigerants. The 1/4" external flare connector simplifies HVAC pressure switch installation, while the "Sight-Set" calibrated scale allows for accurate setpoint adjustments without removing the cover. Rated for 120/208/240 VAC, this automatic reset pressure control is a staple for contractors maintaining system reliability and protecting compressors from operating outside safe parameters.

• Direct Compatibility: Drop-in replacement for the legacy P70CA-56 model.
• Precise Adjustment: Features a visible "Sight-Set" scale for rapid pressure control setting in the field.
• Rugged Construction: All-steel housing protects internal bellows and SPST contacts from mechanical damage.
• Universal Application: Rated for a wide voltage range (120V to 240V) and compatible with standard non-corrosive refrigerants.

What is the difference between P170CA-1 and the older P70CA-56?
The P170CA-1 is the modern production equivalent of the P70CA-56, maintaining identical mounting footprints, electrical ratings, and pressure specifications for a literal 1-to-1 swap.

Can this control be used for condenser fan cycling?
While typically used for capacity control due to its Open-High action, always verify your specific wiring diagram. For standard fan cycling, an Open-Low (P170A) model is more common; however, the P170CA-1 is high-performing in high-side pressure limiting roles.

Is this unit compatible with R-410A systems?
Yes, as long as the operating pressures remain within the 100 psi range and the 325 psi maximum bellows overrun limit. It is compatible with all non-corrosive refrigerant types.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.